John wants to compare two means.His sample statistics were 1 = 22.7,s12 = 5.4,n1 = 9 and 2 = 20.5,s22 = 3.6,n2 = 9.Assuming equal variances,which is the approximate 95 percent confidence interval for the difference of the population means?
A)[2.44,6.19]
B)[1.17,5.08]
C)[0.08,4.32]
D)[−0.09,3.19]

Question

John wants to compare two means.His sample statistics were  1 = 22.7,s12 = 5.4,n1 = 9 and  2 = 20.5,s22 = 3.6,n2 = 9.Assuming equal variances,which is the approximate 95 percent confidence interval for the difference of the population means?
A)[2.44,6.19] 
B)[1.17,5.08] 
C)[0.08,4.32] 
D)[−0.09,3.19]

Quizplus · Accepted Answer

The Answer of John wants to compare two means.His sample statistics were  1 = 22.7,s12 = 5.4,n1 = 9 and  2 = 20.5,s22 = 3.6,n2 = 9.Assuming equal variances,which is the approximate 95 percent confidence interval for the difference of the population means?
A)[2.44,6.19] 
B)[1.17,5.08] 
C)[0.08,4.32] 
D)[−0.09,3.19]

John Wants to Compare Two Means